CalcWall

The tool wall for home & building projects

Precise calculators for roofing, siding, lumber, concrete, sand and gravel. Measure once, get the exact amount to buy, and walk into the store with a list.

CW-03Roof Pitch6/ 1226.57° roof angleCW-02Cubic Yards2.47cu yd20 × 10 ft bed, 4 in deepCW-11Lumber3boards1×12 × 10 ft, 88% usedCW-13Asphalt8.70tons12 × 40 ft drive, 3 in

How it works

1

Measure

Grab a tape measure and note the length, width and depth of your project. Feet, inches or meters all work.

2

Calculate

Type the numbers in. You see the answer instantly, plus the bags, pieces or tons to buy and an optional cost estimate.

3

Buy with confidence

Copy the result for your supplier. Every page shows the formula and a worked example, so you can check the math yourself.

Popular calculators

CW-01MeasurementCubic Feet CalculatorVolume of 17 shapes in cubic feet, yards, gallons and bags.CW-02MeasurementCubic Yards CalculatorYards, tons and bags of soil, mulch, gravel or concrete.CW-03Roofing & SidingRoof Pitch CalculatorPitch, angle, slope factor and roof area, four ways.CW-04Roofing & SidingRafter Length CalculatorRafter length, birdsmouth, ridge height and hip rafters.CW-05Roofing & SidingRoof Truss CalculatorTruss count, cut list, loads and cost for six truss types.CW-06Roofing & SidingSiding CalculatorSquares, pieces and trim for any siding product.CW-07Roofing & SidingVinyl Siding CalculatorBoxes, panels, J-channel, corners and starter strip.CW-08Roofing & SidingBoard and Batten CalculatorBoards, battens and spacing, outside or as an accent wall.

Browse by project

Roofing & Siding

Roof pitch, rafters, trusses and siding materials.

6 calculators

Carpentry & Lumber

Board feet, framing, lumber and trim work.

4 calculators

Measurement

Volume and area conversions every project needs.

2 calculators

Landscaping & Paving

Asphalt, sand, gravel and stone for yards and driveways.

3 calculators

Built for real projects, not math class

Most home projects go wrong at the store, not on site. You buy six bags when you needed nine, or a full yard of gravel when half would have done. CalcWall exists to fix that. Each calculator answers the question you actually have, such as “how many bags?” or “how many boards?”, not just a raw number.

Whether you are filling a raised bed, framing a shed wall or pricing a new driveway, you get the quantity, a sensible allowance for waste and, if you add a price, a cost estimate. Every calculator works on your phone in the store aisle, runs entirely in your browser and never asks you to sign up.

Pros are welcome too: our pages list the exact conversion factors and assumptions behind every result, so estimators and contractors can check the numbers before they go into a quote. See how we calculate.